Answer:
1.287 +0+ 363 = 650
2. - 43 = -61 + 18
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Answer:
1.287 +0+ 363 = 650
2. - 43 = -61 + 18
1. 287 + a + 363 = 650
650 + a = 650
a = 650 - 650
a = 0
2. -43 = a + 18
-43 -18 = a
- 61 = a
Hope it helps